Wow! Looks like we have a good old fashioned celebrity beef brewing here! And, we think we know who the definitive winner is!

Last month, Jay Mohr and Alyssa Milano were both attending the 2013 Nascar Sprint Cup Series Awards in Las Vegas (pics above), when the radio host for some reason decided to comment on the actress' weight!!

If anyone is confused about what body shaming is, THIS IS IT!

During a radio show after the event, Jay chimed in and unnecessarily commented on her body (in a cruel manner, mind you), saying she's:

"…very tiny — in height — [but] it seems like she had a baby and said, 'I don’t really give a sh-t' — I read it on her gut."

Wow! Either Jay is blind or just a total jerk, because Alyssa looks AH-mazing!! She was wearing that exact outfit, in the pic (above), so clearly, he needs to get his eyes head checked!

Well, the actress wasn't going to take the nasty comments lying down, and she took to Twitter to respond, saying:

.@jaymohr37 So sorry you felt the need to publicly fat-shame me. Be well and God Bless. Please send my love to your beautiful wife.

wow what a jerk! She just had a baby give her a break! I think she looks pretty damn good. Jay on the other hand is not attractive what so ever and has absolutely no right to comment on anyone elses appearance! Maybe he should worry about his own weight and looks. I really hope he reads these comments, he needs to be knocked down a few notches!

LOL!!! Doesn't this guy have a mirror at home……Alyssa hit the hammer on the head with the "beautiful wife" thingy……He is really lucky though!!! Cos' if he were on Charmed, she would have already vanquished his sorry ass by now!!!! You look amazing Alyssa…..I miss you playing Phoebe so so much!!! Happy New Year!!!